MTW-ACC100 Platinum Ring Electrode Chlorine Sensor adopts a dual platinum ring electrode design based on the constant potential (potentiostatic) principle, delivering accurate and stable residual/free chlorine measurement without a membrane or reagents.

It features two high-purity platinum rings as working and counter electrodes, paired with an Ag/AgCl reference electrode. This three-electrode system ensures linear current response proportional to chlorine concentration, with excellent stability and a long service life.

Built-in automatic temperature compensation corrects temperature-induced errors; optional pH compensation further optimizes accuracy in varying water quality. Equipped with RS485 MODBUS-RTU digital output for seamless integration with PLC, controllers, and remote monitoring systems.

The no-membrane, no-reagent design minimizes maintenance-just regular cleaning of the platinum surface. The IP68-rated housing is corrosion-resistant and suitable for long-term submerged or flow-cell installation.

Widely used in drinking water plants, municipal water supply, swimming pools, industrial disinfection, reclaimed water, and hospital wastewater for continuous chlorine monitoring.

This Platinum Ring Electrode Chlorine Sensor is a high-precision online monitor for free/residual chlorine. It adopts constant-potential (potentiostatic) method with dual platinum ring electrodes (working & counter) plus an Ag/AgCl reference electrode. No membrane or electrolyte needed; the platinum rings ensure fast redox reaction and long service life.

Integrated automatic temperature & pH compensation eliminates water quality interference. Standard RS485 Modbus-RTU digital output; IP68 waterproof, 3/4" NPT or PG13.5 thread for installation. Ideal for 24/7 continuous monitoring in water disinfection systems.

Key Advantages

Platinum ring electrodes: High purity Pt, corrosion-resistant, fast response, long life
Membrane-free & reagent-free: No consumables, low maintenance
Dual compensation: Stable readings in varying pH/temp water
High precision: ≤±1% FS for drinking water applications
Digital RS485: Easy integration with PLC, SCADA, cloud systems
Easy cleaning: Smooth platinum surface, simple upkeep

Product Features

Stable zero-point performance
Ensures accurate and reliable measurements
Requires compatible flow equipment for use
Simple structure, easy to clean
Membrane-free design, no need for electrolyte or consumables
Suitable for residual chlorine, chlorine dioxide, and ozone in water
Can be compared with DPD measurement method

Technical Parameters

Measurement Parameter	Residual Chlorine/Dissolved Ozone
Dimensions	13 × 120 mm
Material	Stainless steel
Electrode Material	Platinum
Range	0–2.000 mg/L, 0–20.00 mg/L
Accuracy	±5%
Temperature Range	0–50°C
Temperature Sensor	PT1000
Flow Rate Requirement	20–40 L/h
Cable Length	5 m (open-ended)

Application

Drinking water plants, water supply networks, swimming pools, secondary water supply, wastewater disinfection, food & beverage, pharmaceutical industry, cooling tower water.